Less than standard separation between cpr-light transport and unknown IFR aircraft.

Attributes
ACN	85937
Time
Date	198804
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : hpn
State Reference	NY
Altitude	msl bound lower : 4800 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny tracon : n90
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 100 flight time total : 3100 flight time type : 330
ASRS Report	85937
Person 2
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance none taken : insufficient time other
Consequence	Other
Miss Distance	unspecified : 12000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure Operational Error

Narrative:

We were given clearance to fly ILS 16 localizer inbound maintain 5000' to leosa intersection, which is 10.4 DME. At approximately 12 DME at 5000' on the localizer, we switched controllers and were told to immediately turn to 090 degrees and increase our descent, that we had traffic at 2 O'clock and 2 mi. We were then told to turn left to 190 degrees, descend through 3000', that our previous clearance was void.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION BETWEEN CPR-LTT AND UNKNOWN IFR ACFT.

Narrative: WE WERE GIVEN CLRNC TO FLY ILS 16 LOC INBND MAINTAIN 5000' TO LEOSA INTXN, WHICH IS 10.4 DME. AT APPROX 12 DME AT 5000' ON THE LOC, WE SWITCHED CTLRS AND WERE TOLD TO IMMEDIATELY TURN TO 090 DEGS AND INCREASE OUR DSCNT, THAT WE HAD TFC AT 2 O'CLOCK AND 2 MI. WE WERE THEN TOLD TO TURN LEFT TO 190 DEGS, DSND THROUGH 3000', THAT OUR PREVIOUS CLRNC WAS VOID.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.